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Finding the Fourth Proportional to 57,740.70, 86,623.20 and 18,301.80

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Solution

The fourth proportional to 57,740.70, 86,623.20 and 18,301.80 is: 27,456.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,740.70 : 86,623.20 = 18,301.80 : x
  2. Step 2: Convert to fraction form
    57,740.70/86,623.20 = 18,301.80/x
  3. Step 3: Cross multiply
    57,740.70x = 86,623.20 × 18,301.80
  4. Step 4: Simplify right side
    57,740.70x = 1,585,360,481.76
  5. Step 5: Solve for x
    x = 1,585,360,481.76/57,740.70
  6. Step 6: Final answer
    x = 27,456.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.